Abstract
Most of investment in power generation industry tends to combined gas and steam turbine power plants due to thermodynamic and economic reason. Beside this tendency repowering of existing power plants is an attractive option for upgrading and life extension of existing power plants. In fact repowering is usage of combined cycle advantages for increasing power output and efficiency in steam power plants. Several approaches are proposed for repowering regards to condition of existing power plants such as life period and condition of parts of that and most important off all boiler condition. One of this approaches which provide opportunity of existing boiler reusing is converting existing power plant to fully fired combined cycle by installing a gas turbine and integration of that with existing steam units boiler. The aim of this paper is investigation of condition and how to integration of gas turbine and boiler. Also by exerting the condition and limitation in integration, the effect of gas turbine parameters to power output and efficiency of after repowering have been investigated. Finally the best condition of gas turbine parameters with high power and efficiency will be introduced.
Published Version
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